Pin clutch or guard.



T. SOKOLOWSKI,

PIN CLUTCH 0R GUARD APPLICATION FILED AUG. 8, 1912.

Patented Mar. 18, 1913.

6 m w m a T. Sakolswsk .4 @GIZQL'GWSZIL 015' ST. LOVES, l AII'CSSG'URI.

1 1s on ones-in.

{Specification of letters lPe-itented 313 $931.30

. iipplicetion filed August 8, 1912. Serial 350. 714,054.

' :ZZ choir.- ii may concern:

known that TEOFIL Sorromwsur,

u s, State of Missouri, have invented new and useful improvements in hitches or Guards; and I do declare "-118 flloivin to he full, clear end exect scription of the invention, such as will enable others skilled in the (BEL to which it :1 ermine to make and use the some.

.lhis invention relates to pin clutches, and ecielly designed for use in connection with scarf or hot pin guards.

The object of the invention is to provide a simple and efficient guard for preventin the accidental Withdre rel of the pin which so often results in its loss.

With this and other objects in View, tli

Q invention consists of certain novel features 1 of construction. and the combination an arrangement or parts as will be more full described and claimed.

In the accompanying drawings: Figure 1 is perspective vies of a pin equipped with this improved guard; Fig. 2 is a central longitudinal section of the guard on an enlerged scale; Fig. 23 is an enlarged detail p ctive view of the cage which guides and coilperotes with the pin receiving element.

in the embodiment illustrated, a clutch casing 1 is shown in the form of a tubular cylindrical member which tapers towardone end ind erininates in a tiered mouth 2 which receives the point or the pin A, the tiers of the mouth facilitating the insertion of the pin point. This casing 1 has an ennulor shoulder 3 on its inner face at the base of its tapered portion on Which is udupied to he seated on annular member l of the pin receiving eleinent guide or cage This cage or guide is composed oi? the .nnulur ring provided With a plurality of paced fingers 6 extending at right angles rom one face thereof in the same direction, -lid which are or 21 length sufficient to terminate at a point spaced from the edge of the large end of the casing 1 When the parts are assembled, for a purpose to he described These fingers 6 are thickened at their bus-es and said thickened portions are inclined on their inner faces to cooperate with the topered end of the casing 1 to form a conelike socket for the reception of a pin receiving; element 7 to he described, Tfhen the United States, residing at said csge 5 is inserted in the casing l the ring member 4; thereof rests on the shoulder 3 of said casing, and the fingers 6 closely engage the inner wells of the casing and form guides for the pin receiving element 7. This pin receiving element 7 comprises a tubular shank 8 having alletcrally extending flange 9 at one end and a clutch n1em= her 10 at its other end.

l he clutch member 10 as shown, is in the em of e hollow heed of substantially trun- GfiiedCQM-fillflffifilV-lili an aperture in its end communicating with the bore of the tubular shank and with a plurality of radially extending apertures 11 which communicate with said shank and form seats for the clutch halls 12, three or whichere here shown. This head has notches in its periphcry arranged at the outer ends of the opertures 11 which are designed to engage the i of the cage 5 and by means of which said element? is guided longitudinully Within the casing l.

A coifid spring 13 encircles the shank 8 hears one end against the inner end of the head or clutch member 10 and at its other end against a washer 1% loosely mounted on said shank. The balls 12 are held in their seats by engagement with the inclined cam portion at the base of the lingers 6, and the fart-her the clutchmember 10 is rojected into the reduced end ofthocasm the further the halls are forced into said 0 utch member into close relation and thus exert a tighter gripping action on the pin A which is inserted between the bulls. -When the parts are assembled the edge of the large end of the casing 1 is crimped down over the Washer 14, which forms a" closure for said casing end, and to release the clutch the shank is moved outwardly against the tension of the spring 13, the flange 9 forming suitable gripping means for actuating said shank. .ll hen the flange is released the spring 13 exerts its tension to forcethe 100 clutch 'ineniher inwardly into engagement with the inclined incesof the cage fingers and the tapered sent at the reduced end of the casing. it will thus be obvious that the spring 13 nornmlly holds the clutch member l0 projected into the tapered end of the cas- 7 ing 1, and when u. pin is inserted between the balls 12 they are spread apart and the clutch member l0 forced back into the casing 1 against the tension of the spring 13, 110 

